I've spent the last several days with my overhauled Chronomètre à Résonance. Given the nature of the service, I've been very concerned that everything is done right, and to my delight and surprise it was. Besides being way out of time loss/gain , it was out of sync, it would not unwind beyond half-way, and so it was effectively running of half power reserve. Now it's fine, and the sync and time-keeping are great.